#include <stdio.h>


/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(void)
 {
 	double a,b,c,d,e,f;
 	a=1;
 	b=4;
 	c=a+b;
 	d=b-a;
 	e=a*b;
 	f=a/b;
 	printf("c=%lf.\n",c);
 	printf("d=%lf.\n",d);
 	printf("e=%lf.\n",e);
 	printf("f=%lf.\n",f);
	return 0;
}
